THE LINYPHIAD^: 



151 



Erigone autumnalis. — This is one of the few species of Eri- 

 gone that can be distinctly separated from the others. It lives 

 in the same places and is found with longipalpis 

 in the autumn flights. It is only a twentieth of 

 an inch long, but can be distinguished 

 by its light color and bright yellow 

 head. The palpi of the males have 

 the tibia shorter than the patella and 

 the tooth on the patella turned more 

 forward than in longipalpis, with a 

 longer and sharper point tapering 

 from the base to the tip (fig. 367). 

 Ceratinella laetabilis. — This is about 

 the same size as fissiccps, — a six- 



Figs. 366, 367. Erigone autumna- t 



lis. — 366, under side of cephaio- teenth of an inch long, — but much 



thorax of male. 367, palpus of darker colored and the ma ] es do nQt 

 male. 



have horns or humps on the head. 

 The cephalothorax and sternum are dark 

 brown, and the legs dark orange. The thick- 

 ened circle on the abdomen (fig. 368) is dark 

 orange brown and the thinner 

 parts gray. In the female the 

 thick circle is usually wanting 

 and the whole abdomen dark 

 gray, with lighter spots around 

 the muscular marks. There are 

 also hardened spots around the 

 stem of the abdomen and under 

 the spinnerets in both sexes. 



The head is slightly elevated 



it«ii ,,,,, 369 368 



behind the eyes, a little more Figs ^ ^ 3;o Ceratinella ljEtabilis 



in the male than in the female. — 3 68 > outline of side of female en- 



™. . , . .-. - . larged sixteen times. 369, 370, end of 



The male palpi (figs. 369, 370) ma i e pa ipus. 



